Liquid pump and elevator



Septn v 3%24 I Q J. E. OGDEN LIQUID PUMP AND ELEVATOR Filed May 28, 1925 3 Sheets-Sheet. l

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J. E. L. OGDEN LIQUID PUMP AND ELEVATOR Filed May 1925 3 Sheets-Sheet 2 mvezvla ydi i/ Sept. 23 1924.

. J. E. 1....OGDEN LIQUID PUIVIi AND ELEVATOR Filed May 28. 1923 3 Sheegs-Sheet 5 I: FL

3 l. llll III 1.

' vationtpartly in section) Patented Sept. 23, 1924.

UNITEDSTATES PATENT OFFICE.

. JOHN EDWARD L wIs OGD N; or LISCARD, ENGLAND.

' LIQUID PUMP AND ELEVATOR.

Application filed May as, .1923. Serial No. 642,082.

" out the employment of packing and like means which increase frictional losses in the pump, and in which the operation of the pump ire-automatically controlled in a simple and eiiicient manner. y a

My invention comprises a liquid pump or elevator in which the pump piston is exposed at one side to the liquidbeing pumped and at the other side to the operative pressure fluid, and is combined with a further piston acted upon by the pressure fluid to give the pump piston its suction stroke and if desired to assist in the delivery stroke.

My invention further comprises the improved automatic control valve for distributing the pressure fluid to the-pump pistons and for exhausting such fluid.

My invention further comprises the improveddetails of construction and arrangement hereinafter described and claimed.

Referring to the two accompanying sheets of explanatory drawings j Figure l'is a sectional elevation of a boiler .ieed pump constructed in one convenient form in accordancewith my invention.

Figures 2 and 3 are respectively an eleand a sectional elevation at right angles to Figure2 illus trating a liquid elevator constructed in one 7 convenientformin accordance with my invention.

The same reference letters in the three views indicate the same-or similar parts.

Referring in the first'place to Figured, the pump inlet valve is shown at a and the delivery valve at 7). The pump piston is shown at c and'the valve controlling the inlet and exhaust steam for operating the pump at (Z.

The piston 0 works in'a cylindrical cas-.

ing 6 to which is bolted a casing f in which therein.

its object to pro:

of, the steam. on the saidtwo by way of the ripheral groove when the piston; h is forced works the control valve (Z and which contains also a cylinder 9 having a piston h The pistons 0 and h are interconnected by the rod 1'. The space above the piston c is in communication with the space above the piston h b the passage j.

Steam 1s supplie to the pump by the port 76 and exhausts therefrom at the port 972. The valve d has a port a therein which when incoincidence with the port 70 allows steam to pass to the upper face of the piston e and by thepassage j to the upper face of the piston it. The pressure pistons causes the downward and delivery stroke of the piston 0.

VVi th the pistons c and h in their raised positions as shown, that is at the end of a suction stroke and the commencement of a delivery stroke, the underside of the piston h is in communication with exhaust port 0, groove 79, the pe- 9 around the valve d and the annular exhaust groove 1'. The underside of the "head 8 of the valve (Z is also in communication with the underside of the piston h by way of the port t. The upper side of the head 8 of the valve cl canbe placed into communication with the upper sideof the piston it by way of the port 1/ downwards. The port '0 in the valve (Z serves to place the interior of the valve (Z and therefore .the spaces above the pistons 0 and h in communication with the exhaust port m. ie passage 10 serves to allow. any water of condensation from the spaces around the upper endof the piston valve and of the piston h to pass to exhaust. The stud .2; prevents any turning movement of the valve cl.

Th upper side of the piston c is formed with a hollow or depression 7 in which water of condensation can collect and from which it is discharged by way of the passage 2 through thepiston and the port :2 in the cylinder 6 each time the piston reaches the end of its suction or upstroke. The piston c-is prevented from rotary movement in the closing of the steam port is and the placing of the interior of the valve (l in communication with exhaust through the ports 2; and m. At the same time, the annular passage 9' around the valve (l places the steam port 70 in communication with the underside of the piston h. The latter therefore rises and exhaustion of the spaces above the pistons c and it takes place. When the piston it has risen sufiiciently'to uncover the port at, steam passes to the underside of the head'ofthe valve (Z and raises such "valve to the position shown in the drawings 'hereinhefore explained.

when the cycle of operations is repeated.

If the pump illustrated in Figure 1 be used for boiler teeding purposes, the pres- I sure within the boiler is'apphed to the upper face of the piston 0 on thedelivery stroke and the pressure of the liquid opposed to said piston is equal to the said boiler pressure plus the pressure requisite to overcome.

the resistance of valves, bends and the like between the pump and boiler. There is theretore but little difference of pressures at the oppositesides of the piston 0 so that practically no" leakage from side to side of the piston occurs even though no ];iac king rings are employed around'the piston. The

absence of packing rings reduces the friction generated in the pump to a minimum.

g The area of the piston li is' proportioned to provide the necessary excess of pressure on'tlie delivery strokeot the piston c toetfeet deliveryagainst the desired head or pressure.

' The valve (Zis entirely automatic and is moved only when the piston happroaches the ends of its respectivestrokes.

ater of condensation which'inay tend to accumulate in the pump is efi'eotuallyv drained therefrom through the port 2 as Referring to Figures 2 and the pump 7 here illustrated is adapted for the raising of liquids and has means for automatically releasing fro'inthe surface of the liquidany' air or vapour which may be compressedin the pump cylinder The piston 0' has a port, 9 therethrough which comes into line with the port 2 in the cylinder when the piston is at the end of its delivery stroke so as to release any air or vapour from the surface of the'liquid being delivered. hen startingupithis' arrangement makes the pump "seltpriming. The valve cl isot' a type siini- 5 means by the'nr'essure fluid whereby to cause the suc- "tion strokeot the pump piston and to as 'sist the delivery stroke otthe latter.

lar to the control valve of the form of pump shown in Figure l. I providesmall vent apertures 10, 11 in the valve casing to prevent air locks either above or beneath the valve head. In order to ensure that any dirt which may enter the pump through the inlet valve 0, shall be discharged through the valve 1), the bottom. of the pump chamber 12 is made to slope downwards towards the valve 5. The rush of the liquid being discharged therefore carries all solid matter through the delivery valve and keeps the pump chamber clear. I provideautomaticcontrollingwhich the 1: iimp'-is opera-ted similarto the means describedandclaimedin" prior U. S. Patent *No'. 1,478,792, dated December 25,1923. Such means c'omprise as illustrated a piston type valve 13 which in its normal position allows a restricted flow of pressure from the pipe'l i. If, however, a vacuum is created'by liquid is available for pumping, such vac uum acting on the diaphragm 15 at theside 16, causes the arm 17 to turn about itsIpivot "18 and raise the valve li'l so as to allow a larger'area for thejpassage of the pressure fluid to the pump. I V j In the valve arrangement shown in Figure 2, the underside of the piston h is not placed incomii'iunication with exhaust during the down or delivery stroke of thepiston a but the pressure acting to raise the piston h is balanced by the similar pressure acting on The position theupper sidegot' the piston.

fluid to pass to the pump the pump in the pump suction. pipe, this being an indication that the mouth of such pipe is sealed and that therefore of the valve as shown is that which it 00- cupies during the delivery stroke. valve al in this example need ed from rotary movement;

' The not be prevent- If desired, the

piston 0 may have a passage similar-to e,

Figure 1, for expelling water of condensation at the end of the suction'stroke."

My improved pump is simple, compact and eflicient. It is free fromipacking glands and piston packing'aiid can be readily dismantled and re-assembled. 7 It contains a minimum number of'parts:

I clai1n: v

1, In liquid'puinps and'elevators, thecombination with a pump piston, means for ad mitting liquid to be pumped to one side of the piston. means for admitting operative pressure fluid to the opposite side of the piston, means'for permitting the exhaust of the pressure fluichfa second piston connected with the pump piston having its op-' nosi'te sides open to the exhaustmeans and 2.111 liquid pumps and elevators as claimed in claim 1, means for" expelling any fluid side of the pump piston at the end of the suction stroke of the latter, as set forth. 3. In liquid pumps and elevators as claimed in claim 1, a control valve for the 5 pressure fluid provided Withjen enlarged head, the opposite sides of Which are placed *1 communication with the opposite sides of the further piston when the latter approaches the ends of its strokes in order to cause pressure fluid to move the valve in one 10 or other direction, as set forth.

In testimony whereof I have signed my name to thisspecification.

JOHN EDXVARD LEl/VIS OGDEN. 

